Malicious PDF — malware analysis report

Static analysis result for SHA-256 1745bc4f97efe3af…

MALICIOUS

PDF

37.9 KB Authoring application: OpenOffice.org
MD5: 9fdc95d33f6a8657d6e476dab85d7929 SHA-1: 59cae4d568e6a365cef07dff876b151012a19532 SHA-256: 1745bc4f97efe3afd103719387dcdda1baf19d5f5073395773c0528d184a6afa
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or content distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://discoveryelectricbikes.com/uploads/1/3/0/6/130604525/6b44a2db70752.pdf
    • http://smartlets.org/uploads/1/3/0/7/130739006/bovexujafinojugojulu.pdf
    • http://gritpath.com/uploads/1/3/0/8/130874218/dabarotididir.pdf
    • http://premierequitysolutionsllc.com/uploads/1/3/0/6/130605118/8279292.pdf
    • http://dangerzoneuboldo.com/uploads/1/3/0/5/130590051/sixorakefekokir_rikeluwof_kebusifugej_rujedobomiz.pdf
    • http://cesun2018.org/uploads/1/3/0/3/130313212/dukatirusoxi_wudexasatekobuk.pdf
    • http://skyleslawfirm.com/uploads/1/3/0/5/130550769/5779300.pdf
    • http://mobilegeneratorservice.com/uploads/1/3/0/7/130776478/6786ff76d0.pdf
    • http://gabriellelivermore.com/uploads/1/3/0/9/130969937/2339216.pdf
    • http://www.geelong-concrete.com/uploads/1/3/0/4/130489228/baab1.pdf
    • http://hkseminar.com/uploads/1/3/0/8/130874065/zezifiveva.pdf
    • http://bamabreddoodles.net/uploads/1/3/0/3/130379164/vokefiwabuxivu_fuwugibokivasu.pdf
    • http://girishmithran.com/uploads/1/3/0/8/130874599/2447143.pdf
    • http://solidsclothingstore.ca/uploads/1/3/0/4/130483673/9690888.pdf
    • http://musicacademyacadiana.net/uploads/1/3/0/4/130489144/6755296.pdf
    • http://nesmahelp.com/uploads/1/3/0/9/130969433/bisosogajusolamema.pdf
    • http://74-123-77-236.mgwnet.com/uploads/1/3/0/7/130775505/ecef51011e.pdf
    • http://detolosaranch.org/uploads/1/3/0/3/130323453/0f0d99e5008cfa.pdf
    • http://newmexiconeuromuscular.com/uploads/1/3/0/8/130814534/344567e2475e258.pdf
    • http://idahoconstructionandremodeling.com/uploads/1/3/0/8/130874222/5458535.pdf
    • http://recuerdosenfoto.com/uploads/1/3/0/3/130312952/5f0509ea1e3ef9.pdf
    • http://www.lilarot-vipshop.eu/uploads/1/3/0/5/130541131/130541131.html#gta+san+andreas+parachute+cheat+ps2

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033aa.bin
94534cd979ff1ea05ce14a5bff1ad9bf5da098762147d692d12924c4c1eb2cf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33AA 7856 bytes

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